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Online Social Networks (OSNs) are effective platforms for viral marketing. Due to their importance, viral marketing related problems in OSNs have been extensively studied in the past decade. However, none of the existing works can cope with the situation that the propagation rate dynamically increases for popular topics, as they all assume known propagation rates. In this paper, to better describe...
Tang poetry, as one of the most typical ways for ancient Chinese to express their emotions, has been continuously inherited for millenniums in China. Nowadays, though our way of life has changed dramatically, the traditional culture about Tang poetry is still affecting us deeply. However, the psychological effect of Tang poetry remains unclear currently. Motivated by this, we aim to investigate the...
We are developing a multi-wavelength laser for the two-step laser time-of-flight mass-spectrometer (L2MS). The L2MS is designed to detect hydrocarbons in organically-doped analog minerals, including cryogenic Ocean World-relevant ices and mixtures for future astrobiology missions.
An improved front-end processing circuit for bioelectrical signal acquisition is proposed for high common mode rejection ratio. The proposed circuit consists of three parts, bias voltage divider, ADC process unit and virtual driven-right-leg circuit. Through partial public DC bias circuit and virtual right leg drive circuit, common mode rejection ratio of the circuit can be improved effectively, as...
This paper designs a ground-target tracking system with unmanned aerial vehicles(UAVs), which consists of the states estimation of the ground target and the distributed model predictive control with two UAVs. In the tracking system, the extended kalman filter estimates the states of the target, and the distributed model predictive control in the UAVs is responsible to track the target and avoid collision...
Because of the differences in line impedances, parallel inverters with conventional droop control will have huge circulating current, which does not flow through the loads. To mitigate the circulating current, the research in this paper finds out that parallel-operated inverters should have the impedance in inverse proportion to their capacities, which is difficult to realize in practice. To meet...
Functional connectomes (FCs) are powerful in characterizing brain conditions. Temporal FC metrics can index changes in macroscopic neural activity patterns underlying critical aspects of cognition and behavior. However, time-varying properties of temporal brain networks in general mental disorders have been less investigated. In this paper, FCs derived from resting-state fMRI (R-fMRI) data are temporally...
Human brain determines the ability of perceiving and behaving. Previous works have introduced network science and control theory to stimulate the brain states and functions. In this work, network controllability theory is utilized to study the structural controllability of both temporal and static functional brain networks. We find that only a few nodes are the required driver nodes to structurally...
The stability of a network is not simply determined by the stability of its nodes. Network topology and disturbances of the edge weights might lead to the significant difference of network stability. In this work, we find several topological characteristics that affect network stability. By this finding, network stabilization has been more realizable and more effective. Therefore, by removing some...
The expanding 3C (Computer, Communication, and Consumer electronics) manufacturing industry leads to a high demand on the soldering of flexible PCBs. Current manual soldering has the disadvantages of low output, low speed, and low efficiency, and upgrading soldering operations with robotic technologies is mainly limited by the property of deformation of flexible PCBs. In this paper, a novel robotic...
For OAM-based communications and target detection purposes, the OAM-generating method based on planar antenna and the concentric-ring array is proposed, which can collimate the main-lobe direction and suppress the side lobes simultaneously. The total radiation pattern is derived firstly and the feeding coefficient for each ring is optimized utilizing the genetic algorithm (GA). Subsequently, the planar...
For travelling-wave tube in millimeter and submillimeter wave frequency bands, an H-plane and E-plane loaded rectangular waveguide is demonstrated as slow-wave structure. The H-plane and E-plane loaded slow-wave structure is designed at W-band for fast verification of the design concept. The cold-test parameters are compared with measurement results.
Stream processing applications continuously process large amounts of online streaming data in real-time or near real-time. They have strict latency constraints, but they are also vulnerable to failures. Failure recoveries may slow down the entire processing pipeline and break latency constraints. Upstream backup is one of the most widely applied fault-tolerant schemes for stream processing systems...
Clinically used Intravascular Ultrasound (IVUS) imaging majorly operates in the 20∼40MHz range, providing resolution on the order of 100μm. Recent reports showed the potential of higher frequency (60–80MHz) of IVUS improving resolution to the level of 30–60μm, but still inferior to the resolution of OCT (10μm). Whether increasing the working frequency a step further could make IVUS comparable to OCT?...
With the development of information technology, software plays an increasingly important role in the process of social development. However, at the same time, the number of software vulnerabilities is growing, posing a threat to national security and social stability. Therefore, some scholars and research institutions are paying their attention to the study of software vulnerability. In this paper,...
Ultrasonic sparse array can increase the resolution by enlarging the aperture without adding system complexity, and it has characteristics of large scanning range and high detection accuracy, which is one of the most promising applications of ultrasonic nondestructive testing technology. The application of reciprocity theory to scattering of guided waves by flaws was studied. A finite element model...
Both channel and phase noise blind recover are proposed and demonstrated to recover the orthogonal-frequency-division-multiplexing (OFDM) signal without using any training symbols or pilot subcarriers in direct-detection optical OFDM. The proposed receivers can achieve similar performance compared to conventional OFDM receivers.
By an orchestra of multiple enabling techniques at the transmitter and receiver, we experimentally demonstrate a single-channel 102.4-Gb/s transmission up to 240-km standard single-mode fiber (SSMF) at C-band with direct detection. At the transmitter, we realize Nyquist-pulse shaping PAM-4 (NPAM-4) modulation and single-sideband modulation by using a dual-drive Mach-Zehnder modulator. At the receiver,...
In this paper, wavelength division multiplexing and space division multiplexing (WDM-SDM) passive optical access network employing multi-core fiber (MCF) and self-homodyne detection is proposed. 4×56-Gb/s PDM-16QAM-OFDM transmission is realized over 10-km 7-core fiber with simplified digital signal processing.
In this paper, a 60cm free-space optical card-to-card wavelength division multiplexing (WDM) transmission architecture using OFDM modulation and coherent detection is proposed and demonstrated, which can offer flexibility and high speed transmission simultaneously. The experimental results show that the net data rate is up to 106.9Gb/s and the receiver sensitivity is −34dBm at the BER threshold of...
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